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Contractor license records in Ontario, CA
918 records with Ontario as their locality of record in CSLB's records, as of November 3, 2026. Statuses print as the board records them; a record listed as suspended is not a current credential.
Source: California Contractors State License Board (CSLB) — records as of November 3, 2026. Records change; the board’s own CSLB License Check is the current source.
By classification in Ontario
General Building (338) · Electrical (137) · General Engineering (61) · Warm-Air Heating, Ventilating and Air-Conditioning (51) · Painting and Decorating (50) · Plumbing (49) · Low Voltage Systems (36) · Landscaping (34) · Concrete (32) · Flooring and Floor Covering (32) · Roofing (26) · Cabinet, Millwork and Finish Carpentry (22) · Doors, Gates and Activating Devices (22) · Glazing (21) · Drywall (20) · Ceramic and Mosaic Tile (18) · Synthetic Products (17) · Swimming Pool (16) · Masonry (16) · Structural Steel (13) · Fire Protection (12) · Refrigeration (12) · Building Moving/Demolition (12) · Pool and Spa Maintenance (11) · Window Coverings (9) · Sanitation System (9) · Prefabricated Equipment (9) · Lathing and Plastering (9) · Earthwork and Paving (8) · Metal Products (8) · Parking and Highway Improvement (7) · Sign (7) · Reinforcing Steel (7) · Machinery and Pumps (7) · Concrete-Related Services (7) · Hazardous Substance Removal Certification (6) · Ornamental Metal (6) · Fencing (5) · Service Station Equipment and Maintenance (5) · Sheet Metal (5) · Welding (5) · Framing and Rough Carpentry (4) · Construction Cleanup (4) · Tree Service (4) · Residential Remodeling (4) · Non-Electrical Sign Installation (3) · Solar (3) · Non-specialized (3) · Asbestos Certification (3) · Asbestos Abatement (3) · Tree and Palm (3) · Paperhanging (2) · Awnings (2) · Construction Zone Traffic Control (2) · Boiler, Hot-Water Heating and Steam Fitting (2) · Pipeline (2) · Insulation and Acoustical (2) · General Manufactured Housing (1) · Suspended Ceilings (1) · Well Drilling (1) · Lock and Security Equipment (1) · Hardware, Locks and Safes (1) · Safes and Vaults (1) · Siding and Decking (1) · Scaffolding (1)
- B3D ELECTRIC CLEAR
- BALTO DEVELOPMENT INC CLEAR
- BARNES FIBER COMMUNICATIONS CLEAR
- BAUMANN WATERWORKS CLEAR
- BAYWOOD CONSTRUCTION CO CLEAR
- BC7 CONSTRUCTION INC CLEAR
- BCBC CONSTRUCTION CLEAR
- BEAR PAW LANDSCAPE CLEAR
- BELANGER ELECTRICAL SERVICES CLEAR
- BELMAN 'S PAINTING CLEAR
- BEST CHOICE BUILDING & DEVELOPING CLEAR
- BEST DEAL SHUTTERS & BLINDS CLEAR
- BEST PAINTING CLEAR
- BEST VALUE SOLAR ENERGY SYSTEMS CLEAR
- BGW BUILDING PRODUCTS INC CLEAR
- BIG O FLOORING INC CLEAR
- BIG WORM WATER WELL DRILLING Contr Bond Susp
- BILL MARINO CLEAR
- BLUE HAVEN POOLS CLEAR
- BLUE WHALE POOL & SPA REMODELING CLEAR
- BLUELINE POOL CONSTRUCTION CLEAR
- BONILLA CONSTRUCTION CLEAR
- BOUCHOT TEXTURE INC CLEAR
- BPRECISE PLASTERING INC CLEAR
- BRANDON FISHER CONSTRUCTION CLEAR
- BRIAN YAWCHING KAO CLEAR
- BRIGHT EYE POOL SERVICE CLEAR
- BRILLIANT BUILDING GROUP CLEAR
- BRUSH N ROLL PAINTING CLEAR
- BUENA VISTA CONTRACTORS CLEAR
- BULL LINE ELECTRIC CLEAR
- C 2 C PLUMBING INC CLEAR
- C B HOME CONSTRUCTION CLEAR
- C B HOME CONSTRUCTION INC CLEAR
- C M CONSTRUCTION GENERAL CONTRACTORS INC CLEAR
- C P CONSTRUCTION CO INC CLEAR
- CADRE CONSTRUCTION LLC CLEAR
- CAI FALL PROTECTION SYSTEMS CLEAR
- CALI CONSTRUCTION RENOVATION LLC CLEAR
- CALI WINDOW COVERINGS LLC EMP/WK Bnd Susp
- CALIBER DRYWALL CLEAR
- CALIFORNIA BLAZE PROTECTION LLC CLEAR
- CALIFORNIA COMPLETE ASPHALT SERVICES CLEAR
- CALIFORNIA DOOR DOC CLEAR
- CALIFORNIA ELITE BUILDING MAINTENANCE INC CLEAR
- CALIFORNIA STREET LIGHTING CLEAR
- CALIFORNIA TURF MANAGEMENT INC CLEAR
- CALPOINT CONSTRUCTION INC CLEAR
- CALTEK TECHNOLOGIES CLEAR
- CANO ARCHITECTURE CONCRETE REPAIR CLEAR
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